I'm very sure both of the missing tracks are unreleased, the set has been on You Tube for a good 10 years, and ID section on this forum and nobody seems to know them.I was told by Utah Jazz track 8 sounds like a unreleased Alex and Oscar Reece track, because the stab sound was used on a unreleased Alex Reece and Waxdoctor track called Don't Stop. Track 12 is a total mystery Alex said he didn't have it on DAT, and Professor Stretch told me it was not a Jazz Cartel record.

Two mystery tracks. One of them sounds bit like a darker mix of Its A Jazz Thing

that track 12 sounds like something else I have on tape, from late 97 early 98...
Ah hold on, here it is

Fresh - Morning Glory

I really don't reckon track 8 is a It's a Jazz thing remix, it's more techno based, and as Utah Jazz said it sounds like a experimental drum track made by Oscar Reece.
I think I've figured out track 12 it is sadly a unreleased and lost Alex Reece track. Alex told me he didn't have it and couldn't remember it, Utah Jazz who owns a lot of Reece's old dubplates said he didn't recognize it either.
I talked to Pim and Bob Richardson (Touch of Jazz) they both said they didn't make it, but did say it sounded like a Alex Reece production. If you listen to Reece's remix of DJ Phantasy's Relax the erratic drum programming when the track gets going is very similar.
I could be wrong, but after 22 years it's very odd no one has I.D'd this track. Reece did say he made around 25-30 tracks he D.J'd out with, but never released, and Alex Reece to my knowledge is the only person who played it.